Lock for motor-starting cranks.



R. D. MARKHAM.

LOOK FOR MOTOR STARTING cums.

APP!

IOATIOH TILED MAR. 13, 1009.

. Patented May 24, 1910.

UNITED STATES PATENT OFFICE.

IOIONDO D. IAIKHAI, OI CHICAGO, ILLINOIS. AS8103")!- TO AU'ilO LOCK CO.,'OI' CHICAGO, ILLINOIS, A CORPORATION O! ILLINOIS.

LOOK ton IOTOHTABTING CBLNKB.

ipootlootton of Letter: Patent.

Patented May 24, 1910.

To all whom it may concern:

Be it known that I, Roaroxoo D. Maaanan a citizen of the United States, residing at C iicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Locks for Motor- Starting Cranks, of which the following is a full. clear, and exact specification.

This invention telates generally to means for locking the starting cranks of motors, but has more especial n-fertutce to a lock for preventing the motors of automobiles and the like from being started by unauthorized persons.

{lhe subject matter of the present invention is closely related to that of my former application, Serial .\'o. 405,64, tiled Decemlarl 9. 1907.

In the construction of automobiles and the like. it i.-. customary to provide the star iup; l element or crank ol 1 a machine with a Clllit' so that by pushing the starting crank longitudinally it may be caused to come into rotative or clutchin v engagement with the engine shaft where y the engine may be turned er one or more times until it starts, wlnrreupon the clutch will be automatically form-d out of engagement. returning the -tartin crank to its original position.

.\l v llH't'lttlUlt has for its primary object to provide means wln-reln' the starting crank or eh-tut'ltt may be locked a'ainat movin into rot ative engagement with the shaft 0 the motor or other rotary'part by which the motor may be started.

With a view to the attaimncnt of these ends aml the accomplishment of certain other objects which will hereinafter appear the. invention t'ntlnlflS in the feuturea o novelty which will now be described with retort-nuto the accompanying drawings and more mrticularly pointed out in the e aims.

In the said drawings, Figure l isa vertical longitudinal sectional view of a guide or -upport for th starting clement or'crank showing a portion of the latter in section and also illustrating it in its engaged position. Fig. 2 is a detail secti nal view on the line 2--2 of Fig. l. 4 Fig. 3 is a front elevation of the starting crank. Fig. 4 is a pera live view of a sleeve herelnafter-descrilid. Fig. .3 i a perspective view of a part of the lock t'ttM'. Fig. ti is n [WlsPOCtlVfi'YlQW Of the llNli removed. Fi 7 is a horizontal 80cliun on the line 7 --7 o Fig. l.

Ordinarily, and especially in automobile construction, it is custontar to journal the starting crank or element 0 the machine in a filde or sup )Ol't l, in which the stem 2 of e crank 3 s ides and rotates. The stem 2 is arranged in axial alinement with the angine shaft 4, and the latter is provided with some suitable clutch member, such as one or more pins 5 projecting radially therefrom, while the stem 2 is equipped with a com panion clutch member in the form of I notched collar 6 which fits over the end of the shaft 4 and engages the pin 5 when the stem: ll forced toward the shaft and rotated b means of the crank 3 in one direction. \(hen the engine or motor starts or commences to run under its own war the clutch members 5, 6 automatically reload,

causing the stem 2 to move outwardly away from the shaft 4, where it is customarily.

held by the yielding action of a spr' suitably arranged for imparting a nor out-- ward tendency to the stem and preventing the clutch members from accidentally ing into engagement In this exam to of the invention the spring is shown a 7 in the form of the coil a tin surrounding the stem 2 at its outer emf. spring beam at one end a ainst the head or body 3 0f the crank, Wltl e at its other end it bears a shoulder 8 formed on the inner on of a sleeve 9 which surrounds the stem 2 and incases the aprin 7. By this means it will be seen that the v0 9 is normally reaaod against the aide or anp port l whicfi a fixture, ena lee the spring to force the Item 2 .outward in a direction away from the shaft 4 and consequently the stem cannot be forced inward for bringing it into rot.- tive engagement with the shaft unions the stem be ca able of movi relatively to the sleeve 9. la order that is relative movement ma be prevented, I provide suitable means 0 loclu the sleeve 9 toget r. To this and I rovido the sleeve with a notch 10 and upon had 3 I mount an suitable lock having a bolt or latch 11, IN aptod to downwardly into on meat with the notch 10, thereby holding a head 3 a ainat inward morolslllllt with relation to 1t 0 aim 9 and II the vetlia rmnnentyin with the gu i do 1, it necessarily at was that the atem 2 cannot be forced into rotati engatnant withthaahaft unttltholatz comthe starting element and or bolt 11 is again withdrawn from the notch 10. although the crank and stem 2 will me to rotate together with the sleeve 9, the sleeve 9 being held against independent rotation by a pin 12, secured in the lead {i and enga ing in a slot 13 formed longitudinally in tIie sleeve 9. If desired the stem 2 may be locked in its position of rotative enagement with the shaft 4 by providing the s eeve 9 with an additional notch 14 for the cnga ement of the latch 11 when the starting 0 enicnt is forced inwardly, placing the spring 7 under compression.

In this exem )litication of the invention the head 3" of tlic startin element or crank is formed inte rally Will the crank 3 and the stem 2, an surrounds the sleeve 9 and is also formed with a lock housing 15, which holds and incascs the lock for controlling the bolt or latch 11. This lock may be an ordinary lock of commerce, such as shown in Fig. (i, capable of being inserted from the front side of the housing 13, and held in lace therein in any appro rinte way, the back of the housin being c osed by a plate 16 carrying a block the movement of the latch or bolt ll in one direction, but any ot her suitable form of a I lock and arrangement and construction of housing and connective parts might answer the purpose. If desired, the key-hole may be protected by a shield or cover 18 recessed in the front 0 the housing 15, and having a stem or shank l9 pivoted on the pin 20 and provided with a flat shoulder 21 against which press a spring pressed plunger 22 located in a socket 23 m the body 3' and serving to keep the cover or shield 18 closed.

In order that my invention may be understood by those skilled in the art, the details of an exemplitication thereof have n thus s eeifically described, but Vi'hat I c aim is: 1: In a device for the purpose described, a ock comprising a sleeve mounted. upon a crank shaft between the crank and the frame of the machine and suitable means 3:1 1positively lockin the said sleeve on said to prevent ongitudinal movement thereof.

2. In a device for the pur the combination of a motor 8 element havin ment with said nally thereof into and out position, a guide for direct element into and out of engaging position, and means for locking the starting element against lon itudinal me ement toward the motor shaft while permitting its rotary movement.

3. In a device for the pur ose described, the combination of a motor a left, a starting element having means for rotative enga 'ement with said shaft, movable longitudinally ose described, iaft, a starting means for rotative enga eshaft, movable longituiiiof its engaging ing the starting or stop 17 for limiting;

movement toward said thereof into and out of its engaging position, a guide for directing the starting element into and out of en ging position, a member on the starting el r nent incapable of passing said guide and with reference to which member the starting element is movable toward and from and shaft, and means for locking the said member and element together.

In a device for the pur the combination of a motor 8 element havin means for rotative en a ment with said shaft, movable longitm nally thereof into and position, a movable sleeve throng the starting element is longitudinally movable, an abutment or stop for said sleeve, and means for locking the sleeve and starting element against relative longitudinal movement. as

5. In a device for the pn ose described, the combination of a motors left. a starting element having means for rotative enga ment with said shaft, movable long|tud i-- nnlly thereof into and out of its engaging no position, said startin element embodyin a stem, a shouldered eeve surrounding sai stem and spaced therefrom, a spring surrounding said stem within said sleeve and bearing between the shoulder thereof the starting element for tending to force sleeve and starting element apart, an abutment for said sleeve for limiting its movement toward said shaft, and means for locking the startin element and sleeve against relative longitudinal movement.

8. In a device for the pugoee described, the combination of a motor aft, a starting element havin means for rotative e ment with said shaft, movable longitu inally thereof into and out of its position, said starti element embodyi a stem, at shouldered ifeeve surrounding sai stem and spaced therefrom, a spring surrounding said stem within said sleeve and bearing between the shoulder thereof and the starting element for tending to force the sleeve and starting element a an abutment for said sleeve for limiting its sha t, and means for 116 locking the sta'rtin and sleeve against relative longitudinal movement, said starting element also embed ing a head or body portion incasing the ieeve and said locking means.

7. In a device for the purpose the combination of a motor 8 aft, element havin means for rotative on goment with sai shaft, movable longitudma ly thereof into and out of its on ging position, said starting element embogmg a stem, a movable sleeve surrounding said stem, an abutment or stop for limitin the movement of the sleeve toward the sha t said starting element also embodying a body portion en- 13 :20 described, a starting compassing the sleeve, and means for lockinf the sleeve and starting element against re ative longitudinal movement.

8. In a device for the purpose described, the combination with a motor shaft of a starting element movable longitudinally into and out of rotative'en agement with said shaft, a stationary ui e for said starting element, and means or locking said startin element against longitudinal movement an in different positions with respect to said ide, said locking means being mounted on t e startin element.

9. In a evice for the purpose described, the combination with a motor shaft of a starting element movable longitudinally into and out of rotative en agement with said shaft, a stationary ll e for said starting element, and means fb r locking said startin 1 element against longitudinal movement reh ative-to the ide, said locking means being adjustable re atively to the starting element into and out of locking position.

10. In a device for thejpurpose described, the combination with a motor shaft of a starting element reciprocable into and out of rotative engagement with said shaft, a guide for said starting element, means for lockingsaid startin element a inst reciprocating movement re alive to salt guide, and locking means comprising a sleeve reciprocable on said starting element, said sleeve being provided with axially spaced notches therein, and a locking bolt mounted on said starting element and held a ainst axial movement relative thereto, said It being movable into and out of engagement with the recesses in said sleeve.

11. In a device for the purpose described, the combination with a motor shaft, of a rotatable starting element movable longitudinally into and out of rotatable engagement with the motor shaft, a ide for said starting element, and means interengaging between the starting element and the guide for rotatably holding said starting element against longitudinal movement.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 11th day of March A. D. 1909.

ROMONDO D. MARKHAM.

Witnesses:

J. H. Joouml, Jr., C. H. Sun. 

